Lexan is the GE trademark brand name of Polycarbonate. Any Polycarbonate will do. Be careful not to get Acrylic (trade name Plexiglas), which is sometimes sold in the same hardware stores, side-by-side with Polycarbonate. Acrylic is less likely to scratch but more likely to chip or shatter than Polycarbonate. Downsides to Polycarbonate is it is more expensive, more bendable (flutter) at normal temperatures, and yellows over time due to ultraviolet rays.
Originally Posted by The Astronaut Farmer
Wisconsin Organization of Spacemodeling Hobbyists
Fox Valley Rocketeers
Quad Cities Rocketry Society
2012 APCP: 41,326.8 Ns (1% P)
Highest altitude achieved: 21,981' AGL
"Gravity is a cruel and unpredictable mistress"